People who contribute to Duolingo are pushing their political agendas. In a German exercise : "Er liebt seinen Mann." and "Er schenkt seinem Mann ein Buch." (he loves his husband and he gives a book to his husband).
Some of us learn German because we like Nietzsche and Wagner, not because we are interested in today's Germany's progressive" moral decadence. They closed the discussion on that exercise so I'm commenting here about it. Bringing political correctness onto here? I won't be silenced! Freedom of expression goes both ways!